/**
* Displays the Tracker rectangles for manipulation by the user. Returns when the user has either
* finished manipulating the rectangles or has cancelled the Tracker.
*
* @return <code>true</code> if the user did not cancel the Tracker, <code>false</code> otherwise
* @exception SWTException
* <ul>
* <li>ERROR_WIDGET_DISPOSED - if the receiver has been disposed
* <li>ERROR_THREAD_INVALID_ACCESS - if not called from the thread that created the receiver
* </ul>
*/
public boolean open() {
checkWidget();
cancelled = false;
tracking = true;
window = (NSWindow) new NSWindow().alloc();
NSRect frame = NSScreen.mainScreen().frame();
window =
window.initWithContentRect_styleMask_backing_defer_(
frame, OS.NSBorderlessWindowMask, OS.NSBackingStoreBuffered, false);
window.setOpaque(false);
window.setContentView(null);
NSGraphicsContext context = window.graphicsContext();
NSGraphicsContext.setCurrentContext(context);
context.setCompositingOperation(OS.NSCompositeClear);
NSBezierPath.fillRect(frame);
window.orderFrontRegardless();
drawRectangles(window, rectangles, false);
/*
* If exactly one of UP/DOWN is specified as a style then set the cursor
* orientation accordingly (the same is done for LEFT/RIGHT styles below).
*/
int vStyle = style & (SWT.UP | SWT.DOWN);
if (vStyle == SWT.UP || vStyle == SWT.DOWN) {
cursorOrientation |= vStyle;
}
int hStyle = style & (SWT.LEFT | SWT.RIGHT);
if (hStyle == SWT.LEFT || hStyle == SWT.RIGHT) {
cursorOrientation |= hStyle;
}
Point cursorPos;
boolean down = false;
NSApplication application = NSApplication.sharedApplication();
NSEvent currentEvent = application.currentEvent();
switch (currentEvent.type()) {
case OS.NSLeftMouseDown:
case OS.NSRightMouseDown:
case OS.NSOtherMouseDown:
down = true;
}
if (down) {
cursorPos = display.getCursorLocation();
} else {
if ((style & SWT.RESIZE) != 0) {
cursorPos = adjustResizeCursor(true);
} else {
cursorPos = adjustMoveCursor();
}
}
if (cursorPos != null) {
oldX = cursorPos.x;
oldY = cursorPos.y;
}
/* Tracker behaves like a Dialog with its own OS event loop. */
while (tracking && !cancelled) {
NSAutoreleasePool pool = (NSAutoreleasePool) new NSAutoreleasePool().alloc().init();
NSEvent event =
application.nextEventMatchingMask(
0, NSDate.distantFuture(), OS.NSDefaultRunLoopMode, true);
if (event == null) continue;
int type = event.type();
switch (type) {
case OS.NSLeftMouseUp:
case OS.NSRightMouseUp:
case OS.NSOtherMouseUp:
case OS.NSMouseMoved:
case OS.NSLeftMouseDragged:
case OS.NSRightMouseDragged:
case OS.NSOtherMouseDragged:
mouse(event);
break;
case OS.NSKeyDown:
// case OS.NSKeyUp:
case OS.NSFlagsChanged:
key(event);
break;
}
/*
* Don't dispatch mouse and key events in general, EXCEPT once this
* tracker has finished its work.
*/
boolean dispatch = true;
if (!(tracking && !cancelled)) {
switch (type) {
case OS.NSLeftMouseDown:
case OS.NSLeftMouseUp:
case OS.NSRightMouseDown:
case OS.NSRightMouseUp:
case OS.NSOtherMouseDown:
case OS.NSOtherMouseUp:
case OS.NSMouseMoved:
case OS.NSLeftMouseDragged:
case OS.NSRightMouseDragged:
case OS.NSOtherMouseDragged:
case OS.NSMouseEntered:
case OS.NSMouseExited:
case OS.NSKeyDown:
case OS.NSKeyUp:
case OS.NSFlagsChanged:
dispatch = false;
}
}
if (dispatch) application.sendEvent(event);
if (clientCursor != null && resizeCursor == null) {
clientCursor.handle.set();
}
pool.release();
}
if (!isDisposed()) {
drawRectangles(window, rectangles, true);
}
if (window != null) window.close();
tracking = false;
window = null;
return !cancelled;
}
